Curtain roller



Feb. 17, 1931. H. D. sEvlsoN 1,792,771

CURTAIN ROLLER Filed Deo. 14, 1929 2 Sheets-Sheet l Har ewofz, @gw' i M@ Feb. 17, 1931. H. D. sEvlsoN 1,792,771

CURTAIN ROLLER Filed Dec. 14. 1929 2 SheetsL-Sheet 2 Patented Feb. 17, 1931 UNITED STATES PATENT OFFICE HARRY D. SEVISON, F ELKIIART, INDIANA, ASSIGNOR TO THE .A 'DLAKE COMPANY, 0F CHICAGO, ILLINOIS, A CORPORATION 0F ILLINOIS v CURTAIN ROLLER Application led December 14, 1929. Serial No. 413,968.

This invention has vto do with curtainl rollers, and is `particularly concerned with the mechanisms employed in such rollers for Winding the same up. Y

The principal object of the invention is to provide, in a curtain roller, an improved spring winding mechanism which is quite inexpensive to manufacture, is light 1n weight, is noiseless in operation, and will last a long time.

Other objects and advantages of the inven- V tion will be evident upon a full understanding of the construction, arrangement and operation of the improved spring winding mechanism.

Three diierent forms of the invention are presented herein for the purpose of exempliiication, but it will of course be appreciated that the invention is susceptible of embodiment in still other structurally modied forms coming equally within the scope of the appended claims:

In the drawings:

Fig. l is a front view of a curtain roller equipped with the spring winding mechanism of the invention;

Fig. 2 is a longitudinal section through the end of the roller which contains the spring winding mechanism;

Fig. 3 is a similar section through the other end of the roller;

Fig. 4 is an end view of the roller;

Fig. 5 is a perspective view of the ratchetend bung;

Fig. 6 is a perspective view of a modication of the ratchet-end bung;

Fig. 7 is a perspective view of another modification of the ratchet-end bung; and

Fig. 8 is a face view of the one-piece stamping from which the bung shown in Fig. 7 is formed.

The roller shown Vin the drawings includes a thin she-et metal tube 10 which is provided with a hollow inwardly oiset seam 11 in which the upper edge of a curtain 12 is secured. A sheet metal bung 13 of ordinary construction is positioned in the so-called pin end of the tube, and a sheet metal bung 14 of novel construction is positioned in the so- 50 called ratchet end of the tube.

The bung 13 is cup-shaped, and is inserted in the pin end of the tube to a point where the bottom,v 15 of the cup is substantially flush with such end, in which position it is held against movement by the formation of indentations 16 in the tube in register with holes 17 in the sides of the cup. The bung 13 is provided with a central aperture 18 which forms a. bearing for a pin 19 which is carried by a bracket 2O in aXial alignment with the tube.

The bung 14, in the preferred form thereof shown in Figs. 1 to 5 inclusive, is a one-piece stamping which is characterized byv two spaced end disks 21 and 22 Vand a connecting side web 23. The disks 21 and 22 are vided with central apertures 24 and 25, and are cupped toward each other about such apertures to form annular recesses 26 and 27.

A liber Washer 28 of slightly less inside diameter than'the aperture 24 is positioned in the recess 26, and two liber washers29 and 30 of slightly less diameter than the aperture 25 are positioned against each other in the recess 27.

A short' mandril 31 is journaled inthe washers 28, 29 and 30, out of contact with the metal portions of the bung 14, with the ends of the mandril projecting from both ends of the bung. The outer end of the mandril 31 is flattened at 32 to tit within a slot 33 which is formed in a bracket 34, and is deformed intermediate the iattened portion and the outer end of the bung to provide a pair of ratchet teeth 34 for latching engagement with a pair of pawls 35 which are pivoted at diametrically opposite points to the outerend of-'the bung. The innerV end of the mandril is Vplain and has one end of a long wound-up coil spring 36 sleeved thereover in end abutment with the washer 30.

The end of the spring 36 which is in eng'agementy with the mandril 31 is considerably smaller in diameter than the remaining portion of the spring and frictionally grips the mandril, preventing relative rotation therebetween under the unwinding torque of the spring. The other Vend of the spring is hooked through a pair of ears 37 which are formed in a sheet metal apollo? 38, and the pro-y anchor is prevented from turning relative to the tube by a notch (not shown) in one side of the anchor which interlocks with the seam ll on the inside of the tube.

The bung 14 is prevented from turning in the tube by notches 39 and 40 in the disks 21 and 22, which notches interlock with the seam 1l, and the bung, after being properly positioned in the ratchet-end of the tube, is held against endwise movement by the formation of indentations in the tube at opposite sides of one of the disks.

As will be observed in Fig. 2, the bung 14 is but little longer than it is wide, and the l mandril 3l projects inwardly beyond the bung only far enough to engage frictionally with the spring 36, the major portion of the spring between the bung 14 and the anchor 38 being selfsupported. A sleeve 41 of paper or other suitable sound-deadening material may advantageously be inserted in the tube about the spring to prevent direct contact therebetween. rIhe washers 28 and 29 form the supporting bearings for the mandril 3l, while the washer 30 serves more in the capacity of an end thrust bearing and turns with the mandril and the spring, thereby preventing the bearing washer 29 from being dug into by the sharp extremity of the spring.

In Fig. 6 is shown a ratchet-end bung 42 which is a modification of that shown in Figs` l to 5 inclusive. The bung 42, instead of presenting two spaced bearings for the mandril, furnishes one long bearing. The bung 42 consists of a cylindrical wooden block 43 which is provided with a central bore 44 in which the mandril is journaled. A sheet metal plate 45 is attached by tacks 46 to the outer end of the block and is provided with a central clearance aperture 47 for the mandril which is preferably a little larger in diameter than the bore 44. The block 42 and the plate 45 are notched at 48 to prevent the bung from turning in the tube.

In Figs. 7 and 8 is shown another modification of the ratchet-end bung. In those views, the bung is made up from a one-piece sheet metal stamping 49, and the resulting bung is similar to the bung shown in Fig. 5 except that a number of connecting webs 50 are provided in lieu of the simple connecting web 23 shown in Fig. 5.

I claim:

l. In a curtain roller, a ratchet-end bung provided with two spaced end disks having central apertures and annular recesses about the apertures, fiber washers of smaller inside diameter than the apertures positioned in the recesses, and a mandril rotatably supported in the washers.

2. In a curtain roller, a tube, a long coil spring in the tube, a relatively short mandril to which one end of the spring is connected and beyond which the other end of the spring extends, a spring anchor to which the last mentioned end of the spring is connected, and a bung in the tube having axially separated bearing portions in which the mandril is journaled.

3. In a curtain roller, a tube, a bung in the ratchet end of the tube provided with two spaced end disks having central apertures and annular recesses about the apertures, fiber washers of smaller inside diameter than the apertures positioned in the recesses, a mandril of but little greater length than the bung ournaled in the washers with the ends of the mandril projecting from the ends of the bung, a relatively long coil spring secured to the inwardly projecting end of the mandril in abutment with one of the washers, and a spring anchor in the tube to which the other end of the spring is connected at a point in axially spaced relation to the inner end of the mandril.

4. In a curtain roller, a ratchet-end bung` provided with two spaced end disks having central apertures and annular recesses about the apertures, annular bearing members of smaller inside diameter than the apertures positioned in the recesses, and a mandril rotatably supported in said members.

In witness whereof I have hereunto subscribed my name.

HARRY D. SEVISON.

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